修改(加入包含和不相交情况的判断):
using System.Collections; using System.Collections.Generic; using UnityEngine; public class CircleIntersect : MonoBehaviour { public Transform circleA; public float radiusA = 1f; public Transform circleB; public float radiusB = 1f; public bool CalculateCircleIntersect(Vector3 c1p, Vector3 c2p, float c1r, float c2r, out Vector3 p0, out Vector3 p1) { //c1p = circle one position //c1r = circle one radius var P0 = c1p; var P1 = c2p; float d, a, h; p0 = Vector3.zero; p1 = Vector3.zero; d = Vector3.Distance(P0, P1); if (d > c1r + c2r) return false; if (Vector3.Distance(c2p, c1p) + c1r < c2r) return false; if (Vector3.Distance(c2p, c1p) + c2r < c1r) return false; a = (c1r * c1r - c2r * c2r + d * d) / (2 * d); h = Mathf.Sqrt(c1r * c1r - a * a); Vector3 P2 = (P1 - P0); P2 = (P2 * (a / d)); P2 = (P2 + P0); float x3, y3, x4, y4 = 0; x3 = P2.x + h * (P1.y - P0.y) / d; y3 = P2.y - h * (P1.x - P0.x) / d; x4 = P2.x - h * (P1.y - P0.y) / d; y4 = P2.y + h * (P1.x - P0.x) / d; ; //out parameters for a line renderer p0 = new Vector3(x3, y3, 0); p1 = new Vector3(x4, y4, 0); return true; } void OnDrawGizmos() { if (circleA == null || circleB == null) return; var cacheColor = Gizmos.color; var p0 = default(Vector3); var p1 = default(Vector3); var isIntersect = CalculateCircleIntersect(circleA.position, circleB.position, radiusA, radiusB, out p0, out p1); if (isIntersect) { Gizmos.DrawWireSphere(p0, 0.1f); Gizmos.DrawWireSphere(p1, 0.1f); Gizmos.color = Color.red; } Gizmos.DrawWireSphere(circleA.position, radiusA); Gizmos.DrawWireSphere(circleB.position, radiusB); Gizmos.color = cacheColor; } }
原文地址:https://www.cnblogs.com/hont/p/8991727.html
时间: 2024-10-27 11:20:25